A person can potentially use comparisons to mess up his life. For
example, a person can go to the most elegant restaurant which employs
the greatest chef. He can order the most expensive food. Then for the
rest of his life he can say about any other meal, "This isn't as good
as the meal I once had in that five-star restaurant."
I recently related this example to a group of tourists. They laughed.
And then one spoke up and said, "I just realized that I do this all
the time. Just last night at the fancy hotel we were staying at, my
first comment after the meal was, 'This wasn't as good as the food I
ate at another restaurant five years ago.' I didn't realize how
foolish this response is."
-- Rabbi Pliskin's "Happiness: Formulas, Stories, and Insights"